diff --git a/libc/kernel/uapi/linux/fcntl.h b/libc/kernel/uapi/linux/fcntl.h
index 9536d66..c4a8314 100644
--- a/libc/kernel/uapi/linux/fcntl.h
+++ b/libc/kernel/uapi/linux/fcntl.h
@@ -45,4 +45,8 @@
 #define AT_SYMLINK_FOLLOW 0x400
 #define AT_NO_AUTOMOUNT 0x800
 #define AT_EMPTY_PATH 0x1000
+#define AT_STATX_SYNC_TYPE 0x6000
+#define AT_STATX_SYNC_AS_STAT 0x0000
+#define AT_STATX_FORCE_SYNC 0x2000
+#define AT_STATX_DONT_SYNC 0x4000
 #endif